Gossip Girl executive producer Stephanie Savage has promised "emotional" storylines for the second half of this season.

Speaking to E! News, Savage explained that in the next episode of the show, Chuck will meet the woman spotted at his father's grave.

She said: "Chuck and Blair's main story when we come back will be solving the mystery of the lady at Bart's grave - who she is, where she came from, what she wants. I think it's a really great Chuck and Blair story that's very emotional. You see them working together and supporting each other in a way that I think fans will really enjoy."

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Savage added that some of the show's couples could be featured in more explicit scenes.

"We're turning up the heat on all of your couples in the second half of the season," she said. "And I think you will see some of those scenes in a way that people will enjoy and appreciate."

Savage also suggested that Dan and Serena's relationship could be reignited, explaining: "They are definitely in each other's stories this season and in the second half of the season, especially when Serena's dad comes back. Dan will have a big part in that story. And I think that's a very powerful methodology and couple methodology that we would never want to turn our backs on completely."

However, Savage said that she is still unsure which couples will ultimately end up together.

"I feel like we have an endgame in mind but we're also very open to discovering things along the way," she commented. "Relationships that are not in the books, relationships that may even be surprises to us. You want to have an idea, a gameplan, a map that you're following but we're open to possibilities if you find something along the way that you want to stop and explore."